4040791 has 4 divisors (see below), whose sum is σ = 4052592. Its totient is φ = 4028992.

The previous prime is 4040789. The next prime is 4040797. The reversal of 4040791 is 1970404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4040791 - 2¹ = 4040789 is a prime.

It is a Duffinian number.

4040791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5371 + ... + 6076.

It is an arithmetic number, because the mean of its divisors is an integer number (1013148).

Almost surely, 2^4040791 is an apocalyptic number.

4040791 is a deficient number, since it is larger than the sum of its proper divisors (11801).

4040791 is a wasteful number, since it uses less digits than its factorization.

4040791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11800.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 4040791 is about 2010.1718831981. The cubic root of 4040791 is about 159.2778785948.

The spelling of 4040791 in words is "four million, forty thousand, seven hundred ninety-one".